Systems and methods providing authentication in a microservice system. In some embodiments, the method comprises receiving, from the user interface application, a user interface response corresponding to the user interface request; and sending the user interface response to the client computer. Some embodiments comprise when no cache entry corresponding to the user interface session token is present in the user interface session cache, directing the user interface request to a login service. Some embodiments comprise when the login service receives valid login credentials from the client computer, sending a new user interface session token to the client computer. Some embodiments comprise invalidating the cache entries in the user interface session cache according to a cache expiry policy; and determining whether the cache entry corresponding to the particular user interface session token is valid. In some embodiments, the user interface request session token consists of a single value.